package com.huashizhaoxi.lionapp.controller;

import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.JSONObject;
import com.huashizhaoxi.lionapp.entity.Result;
import com.huashizhaoxi.lionapp.entity.User;
import com.huashizhaoxi.lionapp.service.PayService;
import com.huashizhaoxi.lionapp.service.UserService;
import com.huashizhaoxi.lionapp.utils.JwtUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.javassist.compiler.ast.Pair;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;

@Component
@Slf4j
@ServerEndpoint("/websocket/{token}")  // 接口路径 ws://localhost:8087/webSocket/userId;

public class WebSocket {

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    @Autowired
    private UserService userService;

    @Autowired
    private PayService payService;

    /**
     * 用户ID
     */
    private String userId;

    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    //虽然@Component默认是单例模式的，但springboot还是会为每个websocket连接初始化一个bean，所以可以用一个静态set保存起来。
    //  注：底下WebSocket是当前类名
    private static CopyOnWriteArraySet<WebSocket> webSockets =new CopyOnWriteArraySet<>();

    // 用来存在线连接用户信息
    private static ConcurrentHashMap<String,Session> clientSessionPool = new ConcurrentHashMap<String,Session>();

    private static ConcurrentHashMap<String,Session> ShopSessionPool = new ConcurrentHashMap<String,Session>();

    /**
     * 链接成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam(value="token")String token) {
        try {
            System.out.println("token:"+token);
            Map<String,Object> map = JwtUtils.parseJwt(token);
            if(map == null) {
                return;
            }
            String userId = map.get("id").toString();
            // 先获取userId 对应用户的信息
            User user = userService.getUserById(Integer.parseInt(userId));
            if(user.getRole() == 0){
                // 根据userId判断是否存在连接，存在则先关闭
                if(clientSessionPool.containsKey(userId)) {
                    Session oldSession = clientSessionPool.get(userId);
                    if(oldSession.isOpen()) {
                        oldSession.close();
                    }
                }
                //
                this.session = session;
                this.userId = userId;
                webSockets.add(this);
                clientSessionPool.put(userId, session);
            }else {
                // 根据userId判断是否存在连接，存在则先关闭
                if(ShopSessionPool.containsKey(userId)) {
                    Session oldSession = ShopSessionPool.get(userId);
                    if(oldSession.isOpen()) {
                        oldSession.close();
                    }
                }
                //
                this.session = session;
                this.userId = userId;
                webSockets.add(this);
                ShopSessionPool.put(userId, session);
            }
            log.info("当前连接的用户id为:"+userId); // 这里可以自定义你的业务逻辑，比如在某个地方保存用户id，方便后面使用
            log.info("【websocket消息】有新的连接，总数为:"+webSockets.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 链接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        try {
            webSockets.remove(this);
            clientSessionPool.remove(this.userId);
            ShopSessionPool.remove(this.userId);
            log.info("【websocket消息】连接断开，总数为:"+webSockets.size());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 收到客户端消息后调用的方法
     *
     * @param message
     */
    @OnMessage
    public void onMessage(String message) {
        log.info("【websocket消息】收到客户端消息:"+message);
        if(message!=null){
            JSONObject msgObj = JSONObject.parseObject(message);
            String type = msgObj.getString("type");
            // 果切订单通知
            if(type.equals("fruit_order")){
                String orderNo = msgObj.getJSONObject("msgContent").getString("orderNo");
                int status = payService.checkOrder(orderNo);
                if(status == 2){
                    // 遍历shopSessionPool
                    for(Map.Entry<String,Session> entry:ShopSessionPool.entrySet()){
                        String key = entry.getKey();
                        Session session = entry.getValue();
                        if(session.isOpen()){
                            session.getAsyncRemote().sendText("fruit_order");
                        }
                    }
                }
            }

        }
    }

    /** 发送错误时的处理
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {

        log.error("用户错误,原因:"+error.getMessage());
        error.printStackTrace();
    }


    // 此为广播消息
    public void sendAllMessage(String message) {
        log.info("【websocket消息】广播消息:"+message);
        for(WebSocket webSocket : webSockets) {
            try {
                if(webSocket.session.isOpen()) {
                    webSocket.session.getAsyncRemote().sendText(message);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    // 此为单点消息
    public void sendOneMessage(String userId, String message) {
        Session session = clientSessionPool.get(userId);
        if(session == null) {
            session = ShopSessionPool.get(userId);
        }
        if (session != null&&session.isOpen()) {
            try {
                log.info("【websocket消息】 单点消息:"+message);
                session.getAsyncRemote().sendText(message);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    // 此为单点消息(多人)
    public void sendMoreMessage(String[] userIds, String message) {
        for(String userId:userIds) {
            Session session = clientSessionPool.get(userId);
            if(session == null) {
                session = ShopSessionPool.get(userId);
            }
            if (session != null&&session.isOpen()) {
                try {
                    log.info("【websocket消息】 单点消息:"+message);
                    session.getAsyncRemote().sendText(message);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }

    }

}
